How do you show the number of items in a vault / category?

Having the number in the sidebar would be very helpful! When updating from the stand-alone 1Password, My iPhone and Mac had a different number of items. Online had 491 items, Dropbox had 1790, Personal had 1781, etc. Since there is NO way to delete duplicates (which is horrible) or easily find the most recently updated between the vaults, it would be helpful to see how many items are in each vault. Once the Personal vault has everything, I'll delete the others. I guess this is what happens when you start with Version 1 of 1Password!